Even though these elements are found in only trace amounts in the human body, they play significant roles in the maintenance of the body.
An example of these important elements include iron, which is used in the blood for carrying oxygen from the lungs to the rest of the body.
Copper, another important element (but only in very small amounts), combines with proteins for proper enzyme production. Zinc is significant to a number of key enzymes, and selenium is essential to antioxidant enzyme activity.

As is often the case in life, too much of a good thing is not always good. Iron becomes toxic in higher accumulations. Copper toxicity, known as copperiedus, is a consequence of excessive copper
in the body and is linked to physical and psychiatric symptoms similar to those of mercury and lead.

The acceptable levels of some of the trace elements found in the human body continue to be studied, though it is known that excess amounts of these elements (mostly metals) in the body can be toxic.
Toxic Elements

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